SMS Sender ID (Header) Checker
Type the sender ID you want to register. The checker tells you instantly whether it follows the DLT header format: 6 letters for transactional and service SMS, or 6 digits for promotional SMS.
- FreeNo sign-up
- InstantCheck as you type
- DLTFormat rules
Check your sender ID
DLT sender ID rules in India
In India the sender ID shown on an SMS is called a header and must be registered on the TRAI DLT portal. Transactional and service headers use 6 letters, usually a short form of your brand, such as BSMSIN. Promotional headers use 6 digits assigned or chosen during registration.
Pick a header that customers recognise as your brand, avoid names of other brands, and register templates under the right header and category. On the phone, the operator adds a prefix and a suffix such as -S, -T, -P or -G; read what the SMS suffix means and what an SMS header is. Our team can register headers and templates for you.
Frequently asked questions
What is a sender ID in SMS?
A sender ID, called a header in India, is the name or number shown as the sender of an SMS. It must be registered on the DLT portal.
How many characters can a sender ID have?
In India a DLT header has 6 characters: 6 letters for transactional and service SMS, or 6 digits for promotional SMS.
Can a sender ID contain numbers and letters together?
No. Transactional and service headers use only letters, and promotional headers use only digits.
Does this tool register my sender ID?
No. It only checks the format. Registration is done on your operator’s DLT portal, and our team can help you with it.
Ready to get started?
Tell us what you want to send and how many messages a month. Our team will set up a free demo.